As in our prior study (Peterle et al. 2021), our controls were two non-amyloidogenic λ LCs: MM, originally identified in a patient with multiple myeloma but without amyloid deposition; and GL, the protein with the precursor germline sequence from which the AL and MM sequences are derived, IGLV6-57. Here, IGLV6-57 is linked to Miyoshi myopathy.